text: /*
   * esp_encrypt.c : IPSec ESP encrypt node using DPDK Cryptodev
   *
   * Copyright (c) 2017 Intel and/or its affiliates.
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at:
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #include <vnet/vnet.h>
  #include <vnet/api_errno.h>
  #include <vnet/ip/ip.h>
  
  #include <vnet/ipsec/ipsec.h>
  #include <vnet/ipsec/esp.h>
  #include <vnet/udp/udp.h>
  #include <dpdk/ipsec/ipsec.h>
  #include <dpdk/device/dpdk.h>
  #include <dpdk/device/dpdk_priv.h>
  
  #define foreach_esp_encrypt_next                   \
  _(DROP, "error-drop")                              \
  _(IP4_LOOKUP, "ip4-lookup")                        \
  _(IP6_LOOKUP, "ip6-lookup")                        \
  _(INTERFACE_OUTPUT, "interface-output")
  
  #define _(v, s) ESP_ENCRYPT_NEXT_##v,
  typedef enum
  {
    foreach_esp_encrypt_next
  #undef _
      ESP_ENCRYPT_N_NEXT,
  } esp_encrypt_next_t;
  
  #define foreach_esp_encrypt_error                   \
   _(RX_PKTS, "ESP pkts received")                    \
   _(SEQ_CYCLED, "Sequence number cycled")            \
   _(ENQ_FAIL, "Enqueue failed to crypto device")     \
   _(DISCARD, "Not enough crypto operations, discarding frame")  \
   _(SESSION, "Failed to get crypto session")         \
   _(NOSUP, "Cipher/Auth not supported")
  
  
  typedef enum
  {
  #define _(sym,str) ESP_ENCRYPT_ERROR_##sym,
    foreach_esp_encrypt_error
  #undef _
      ESP_ENCRYPT_N_ERROR,
  } esp_encrypt_error_t;
  
  static char *esp_encrypt_error_strings[] = {
  #define _(sym,string) string,
    foreach_esp_encrypt_error
  #undef _
  };
  
  extern vlib_node_registration_t dpdk_esp4_encrypt_node;
  extern vlib_node_registration_t dpdk_esp6_encrypt_node;
  
  typedef struct
  {
    ipsec_crypto_alg_t crypto_alg;
    ipsec_integ_alg_t integ_alg;
    u8 packet_data[64];
  } esp_encrypt_trace_t;
  
  /* packet trace format function */
  static u8 *
  format_esp_encrypt_trace (u8 * s, va_list * args)
  {
    CLIB_UNUSED (vlib_main_t * vm) = va_arg (*args, vlib_main_t *);
    CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *);
    esp_encrypt_trace_t *t = va_arg (*args, esp_encrypt_trace_t *);
    ip4_header_t *ih4 = (ip4_header_t *) t->packet_data;
    u32 indent = format_get_indent (s), offset;
  
    s = format (s, "cipher %U auth %U\n",
  	      format_ipsec_crypto_alg, t->crypto_alg,
  	      format_ipsec_integ_alg, t->integ_alg);
  
    if ((ih4->ip_version_and_header_length & 0xF0) == 0x60)
      {
        s = format (s, "%U%U", format_white_space, indent,
  		  format_ip6_header, ih4);
        offset = sizeof (ip6_header_t);
      }
    else
      {
        s = format (s, "%U%U", format_white_space, indent,
  		  format_ip4_header, ih4);
        offset = ip4_header_bytes (ih4);
      }
  
    s = format (s, "\n%U%U", format_white_space, indent,
  	      format_esp_header, t->packet_data + offset);
  
    return s;
  }
  
  always_inline uword
  dpdk_esp_encrypt_inline (vlib_main_t * vm,
  			 vlib_node_runtime_t * node,
  			 vlib_frame_t * from_frame, int is_ip6)
  {
    u32 n_left_from, *from, *to_next, next_index;
    ipsec_main_t *im = &ipsec_main;
    u32 thread_idx = vlib_get_thread_index ();
    dpdk_crypto_main_t *dcm = &dpdk_crypto_main;
    crypto_resource_t *res = 0;
    ipsec_sa_t *sa0 = 0;
    crypto_alg_t *cipher_alg = 0, *auth_alg = 0;
    struct rte_cryptodev_sym_session *session = 0;
    u32 ret, last_sa_index = ~0;
    u8 numa = rte_socket_id ();
    u8 is_aead = 0;
    crypto_worker_main_t *cwm =
      vec_elt_at_index (dcm->workers_main, thread_idx);
    struct rte_crypto_op **ops = cwm->ops;
  
    from = vlib_frame_vector_args (from_frame);
    n_left_from = from_frame->n_vectors;
  
    ret = crypto_alloc_ops (numa, ops, n_left_from);
    if (ret)
      {
        if (is_ip6)
  	vlib_node_increment_counter (vm, dpdk_esp6_encrypt_node.index,
  				     ESP_ENCRYPT_ERROR_DISCARD, 1);
        else
  	vlib_node_increment_counter (vm, dpdk_esp4_encrypt_node.index,
  				     ESP_ENCRYPT_ERROR_DISCARD, 1);
        /* Discard whole frame */
        return n_left_from;
      }
  
    next_index = ESP_ENCRYPT_NEXT_DROP;
  
    while (n_left_from > 0)
      {
        u32 n_left_to_next;
  
        vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next);
  
        while (n_left_from > 0 && n_left_to_next > 0)
  	{
  	  clib_error_t *error;
  	  u32 bi0;
  	  vlib_buffer_t *b0 = 0;
  	  u32 sa_index0;
  	  ip4_and_esp_header_t *ih0, *oh0 = 0;
  	  ip6_and_esp_header_t *ih6_0, *oh6_0 = 0;
  	  ip4_and_udp_and_esp_header_t *ouh0 = 0;
  	  esp_header_t *esp0;
  	  esp_footer_t *f0;
  	  u8 next_hdr_type;
  	  u32 iv_size;
  	  u16 orig_sz;
  	  u8 trunc_size;
  	  u16 rewrite_len;
  	  u16 udp_encap_adv = 0;
  	  struct rte_mbuf *mb0 = 0;
  	  struct rte_crypto_op *op;
  	  u16 res_idx;
  
  	  bi0 = from[0];
  	  from += 1;
  	  n_left_from -= 1;
  
  	  b0 = vlib_get_buffer (vm, bi0);
  	  ih0 = vlib_buffer_get_current (b0);
  	  mb0 = rte_mbuf_from_vlib_buffer (b0);
  
  	  /* ih0/ih6_0 */
  	  CLIB_PREFETCH (ih0, sizeof (ih6_0[0]), LOAD);
  	  /* f0 */
  	  CLIB_PREFETCH (vlib_buffer_get_tail (b0), 20, STORE);
  	  /* mb0 */
  	  CLIB_PREFETCH (mb0, CLIB_CACHE_LINE_BYTES, STORE);
  
  	  op = ops[0];
  	  ops += 1;
  	  ASSERT (op->status == RTE_CRYPTO_OP_STATUS_NOT_PROCESSED);
  
  	  dpdk_op_priv_t *priv = crypto_op_get_priv (op);
  
  	  u16 op_len =
  	    sizeof (op[0]) + sizeof (op[0].sym[0]) + sizeof (priv[0]);
  	  CLIB_PREFETCH (op, op_len, STORE);
  
  	  sa_index0 = vnet_buffer (b0)->ipsec.sad_index;
  
  	  if (sa_index0 != last_sa_index)
  	    {
  	      sa0 = pool_elt_at_index (im->sad, sa_index0);
  
  	      cipher_alg =
  		vec_elt_at_index (dcm->cipher_algs, sa0->crypto_alg);
  	      auth_alg = vec_elt_at_index (dcm->auth_algs, sa0->integ_alg);
  
  	      is_aead = (cipher_alg->type == RTE_CRYPTO_SYM_XFORM_AEAD);
  
  	      if (is_aead)
  		auth_alg = cipher_alg;
  
  	      res_idx = get_resource (cwm, sa0);
  
  	      if (PREDICT_FALSE (res_idx == (u16) ~ 0))
  		{
  		  clib_warning ("unsupported SA by thread index %u",
  				thread_idx);
  		  if (is_ip6)
  		    vlib_node_increment_counter (vm,
  						 dpdk_esp6_encrypt_node.index,
  						 ESP_ENCRYPT_ERROR_NOSUP, 1);
  		  else
  		    vlib_node_increment_counter (vm,
  						 dpdk_esp4_encrypt_node.index,
  						 ESP_ENCRYPT_ERROR_NOSUP, 1);
  		  to_next[0] = bi0;
  		  to_next += 1;
  		  n_left_to_next -= 1;
  		  goto trace;
  		}
  	      res = vec_elt_at_index (dcm->resource, res_idx);
  
  	      error = crypto_get_session (&session, sa_index0, res, cwm, 1);
  	      if (PREDICT_FALSE (error || !session))
  		{
  		  clib_warning ("failed to get crypto session");
  		  if (is_ip6)
  		    vlib_node_increment_counter (vm,
  						 dpdk_esp6_encrypt_node.index,
  						 ESP_ENCRYPT_ERROR_SESSION,
  						 1);
  		  else
  		    vlib_node_increment_counter (vm,
  						 dpdk_esp4_encrypt_node.index,
  						 ESP_ENCRYPT_ERROR_SESSION,
  						 1);
  		  to_next[0] = bi0;
  		  to_next += 1;
  		  n_left_to_next -= 1;
  		  goto trace;
  		}
  
  	      last_sa_index = sa_index0;
  	    }
  
  	  if (PREDICT_FALSE (esp_seq_advance (sa0)))
  	    {
  	      clib_warning ("sequence number counter has cycled SPI %u",
  			    sa0->spi);
  	      if (is_ip6)
  		vlib_node_increment_counter (vm,
  					     dpdk_esp6_encrypt_node.index,
  					     ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1);
  	      else
  		vlib_node_increment_counter (vm,
  					     dpdk_esp4_encrypt_node.index,
  					     ESP_ENCRYPT_ERROR_SEQ_CYCLED, 1);
  	      //TODO: rekey SA
  	      to_next[0] = bi0;
  	      to_next += 1;
  	      n_left_to_next -= 1;
  	      goto trace;
  	    }
  
  	  orig_sz = b0->current_length;
  
  	  /* TODO multi-seg support - total_length_not_including_first_buffer */
  	  sa0->total_data_size += b0->current_length;
  
  	  res->ops[res->n_ops] = op;
  	  res->bi[res->n_ops] = bi0;
  	  res->n_ops += 1;
  
  	  dpdk_gcm_cnt_blk *icb = &priv->cb;
  
  	  crypto_set_icb (icb, sa0->salt, sa0->seq, sa0->seq_hi);
  
  	  iv_size = cipher_alg->iv_len;
  	  trunc_size = auth_alg->trunc_size;
  
  	  /* if UDP encapsulation is used adjust the address of the IP header */
  	  if (sa0->udp_encap && !is_ip6)
  	    udp_encap_adv = sizeof (udp_header_t);
  
  	  if (sa0->is_tunnel)
  	    {
  	      rewrite_len = 0;
  	      if (!is_ip6 && !sa0->is_tunnel_ip6)	/* ip4inip4 */
  		{
  		  /* in tunnel mode send it back to FIB */
  		  priv->next = DPDK_CRYPTO_INPUT_NEXT_IP4_LOOKUP;
  		  u8 adv = sizeof (ip4_header_t) + udp_encap_adv +
  		    sizeof (esp_header_t) + iv_size;
  		  vlib_buffer_advance (b0, -adv);
  		  oh0 = vlib_buffer_get_current (b0);
  		  ouh0 = vlib_buffer_get_current (b0);
  		  next_hdr_type = IP_PROTOCOL_IP_IN_IP;
  		  /*
  		   * oh0->ip4.ip_version_and_header_length = 0x45;
  		   * oh0->ip4.tos = ih0->ip4.tos;
  		   * oh0->ip4.fragment_id = 0;
  		   * oh0->ip4.flags_and_fragment_offset = 0;
  		   */
  		  oh0->ip4.checksum_data_64[0] =
  		    clib_host_to_net_u64 (0x45ULL << 56);
  		  /*
  		   * oh0->ip4.ttl = 254;
  		   * oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
  		   */
  		  oh0->ip4.checksum_data_32[2] =
  		    clib_host_to_net_u32 (0xfe320000);
  
  		  oh0->ip4.src_address.as_u32 =
  		    sa0->tunnel_src_addr.ip4.as_u32;
  		  oh0->ip4.dst_address.as_u32 =
  		    sa0->tunnel_dst_addr.ip4.as_u32;
  
  		  if (sa0->udp_encap)
  		    {
  		      oh0->ip4.protocol = IP_PROTOCOL_UDP;
  		      esp0 = &ouh0->esp;
  		    }
  		  else
  		    esp0 = &oh0->esp;
  		  esp0->spi = clib_host_to_net_u32 (sa0->spi);
  		  esp0->seq = clib_host_to_net_u32 (sa0->seq);
  		}
  	      else if (is_ip6 && sa0->is_tunnel_ip6)	/* ip6inip6 */
  		{
  		  /* in tunnel mode send it back to FIB */
  		  priv->next = DPDK_CRYPTO_INPUT_NEXT_IP6_LOOKUP;
  
  		  u8 adv =
  		    sizeof (ip6_header_t) + sizeof (esp_header_t) + iv_size;
  		  vlib_buffer_advance (b0, -adv);
  		  ih6_0 = (ip6_and_esp_header_t *) ih0;
  		  oh6_0 = vlib_buffer_get_current (b0);
  
  		  next_hdr_type = IP_PROTOCOL_IPV6;
  
  		  oh6_0->ip6.ip_version_traffic_class_and_flow_label =
  		    ih6_0->ip6.ip_version_traffic_class_and_flow_label;
  
  		  oh6_0->ip6.protocol = IP_PROTOCOL_IPSEC_ESP;
  		  oh6_0->ip6.hop_limit = 254;
  		  oh6_0->ip6.src_address.as_u64[0] =
  		    sa0->tunnel_src_addr.ip6.as_u64[0];
  		  oh6_0->ip6.src_address.as_u64[1] =
  		    sa0->tunnel_src_addr.ip6.as_u64[1];
  		  oh6_0->ip6.dst_address.as_u64[0] =
  		    sa0->tunnel_dst_addr.ip6.as_u64[0];
  		  oh6_0->ip6.dst_address.as_u64[1] =
  		    sa0->tunnel_dst_addr.ip6.as_u64[1];
  		  esp0 = &oh6_0->esp;
  		  oh6_0->esp.spi = clib_host_to_net_u32 (sa0->spi);
  		  oh6_0->esp.seq = clib_host_to_net_u32 (sa0->seq);
  		}
  	      else		/* unsupported ip4inip6, ip6inip4 */
  		{
  		  if (is_ip6)
  		    vlib_node_increment_counter (vm,
  						 dpdk_esp6_encrypt_node.index,
  						 ESP_ENCRYPT_ERROR_NOSUP, 1);
  		  else
  		    vlib_node_increment_counter (vm,
  						 dpdk_esp4_encrypt_node.index,
  						 ESP_ENCRYPT_ERROR_NOSUP, 1);
  		  to_next[0] = bi0;
  		  to_next += 1;
  		  n_left_to_next -= 1;
  		  goto trace;
  		}
  	      vnet_buffer (b0)->sw_if_index[VLIB_TX] = (u32) ~ 0;
  	    }
  	  else			/* transport mode */
  	    {
  	      priv->next = DPDK_CRYPTO_INPUT_NEXT_INTERFACE_OUTPUT;
  	      rewrite_len = vnet_buffer (b0)->ip.save_rewrite_length;
  	      u16 adv = sizeof (esp_header_t) + iv_size + udp_encap_adv;
  	      vlib_buffer_advance (b0, -adv - rewrite_len);
  	      u8 *src = ((u8 *) ih0) - rewrite_len;
  	      u8 *dst = vlib_buffer_get_current (b0);
  	      oh0 = vlib_buffer_get_current (b0) + rewrite_len;
  
  	      if (is_ip6)
  		{
  		  orig_sz -= sizeof (ip6_header_t);
  		  ih6_0 = (ip6_and_esp_header_t *) ih0;
  		  next_hdr_type = ih6_0->ip6.protocol;
  		  memmove (dst, src, rewrite_len + sizeof (ip6_header_t));
  		  oh6_0 = (ip6_and_esp_header_t *) oh0;
  		  oh6_0->ip6.protocol = IP_PROTOCOL_IPSEC_ESP;
  		  esp0 = &oh6_0->esp;
  		}
  	      else		/* ipv4 */
  		{
  		  u16 ip_size = ip4_header_bytes (&ih0->ip4);
  		  orig_sz -= ip_size;
  		  next_hdr_type = ih0->ip4.protocol;
  		  memmove (dst, src, rewrite_len + ip_size);
  		  oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
  		  esp0 = (esp_header_t *) (((u8 *) oh0) + ip_size);
  		  if (sa0->udp_encap)
  		    {
  		      oh0->ip4.protocol = IP_PROTOCOL_UDP;
  		      esp0 = (esp_header_t *)
  			(((u8 *) oh0) + ip_size + udp_encap_adv);
  		    }
  		  else
  		    {
  		      oh0->ip4.protocol = IP_PROTOCOL_IPSEC_ESP;
  		      esp0 = (esp_header_t *) (((u8 *) oh0) + ip_size);
  		    }
  		}
  	      esp0->spi = clib_host_to_net_u32 (sa0->spi);
  	      esp0->seq = clib_host_to_net_u32 (sa0->seq);
  	    }
  
  	  if (sa0->udp_encap && ouh0)
  	    {
  	      ouh0->udp.src_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
  	      ouh0->udp.dst_port = clib_host_to_net_u16 (UDP_DST_PORT_ipsec);
  	      ouh0->udp.checksum = 0;
  	    }
  	  ASSERT (is_pow2 (cipher_alg->boundary));
  	  u16 mask = cipher_alg->boundary - 1;
  	  u16 pad_payload_len = ((orig_sz + 2) + mask) & ~mask;
  	  u8 pad_bytes = pad_payload_len - 2 - orig_sz;
  
  	  u8 *padding =
  	    vlib_buffer_put_uninit (b0, pad_bytes + 2 + trunc_size);
  
  	  /* The extra pad bytes would be overwritten by the digest */
  	  if (pad_bytes)
  	    clib_memcpy_fast (padding, pad_data, 16);
  
  	  f0 = (esp_footer_t *) (padding + pad_bytes);
  	  f0->pad_length = pad_bytes;
  	  f0->next_header = next_hdr_type;
  
  	  if (is_ip6)
  	    {
  	      u16 len = b0->current_length - sizeof (ip6_header_t);
  	      oh6_0->ip6.payload_length =
  		clib_host_to_net_u16 (len - rewrite_len);
  	    }
  	  else
  	    {
  	      oh0->ip4.length =
  		clib_host_to_net_u16 (b0->current_length - rewrite_len);
  	      oh0->ip4.checksum = ip4_header_checksum (&oh0->ip4);
  	      if (sa0->udp_encap && ouh0)
  		{
  		  ouh0->udp.length =
  		    clib_host_to_net_u16 (clib_net_to_host_u16
  					  (ouh0->ip4.length) -
  					  ip4_header_bytes (&ouh0->ip4));
  		}
  	    }
  
  	  b0->flags |= VLIB_BUFFER_TOTAL_LENGTH_VALID;
  
  	  /* mbuf packet starts at ESP header */
  	  mb0->data_len = vlib_buffer_get_tail (b0) - ((u8 *) esp0);
  	  mb0->pkt_len = vlib_buffer_get_tail (b0) - ((u8 *) esp0);
  	  mb0->data_off = ((void *) esp0) - mb0->buf_addr;
  
  	  u32 cipher_off, cipher_len, auth_len = 0;
  	  u32 *aad = NULL;
  
  	  u8 *digest = vlib_buffer_get_tail (b0) - trunc_size;
  	  u64 digest_paddr =
  	    mb0->buf_physaddr + digest - ((u8 *) mb0->buf_addr);
  
  	  if (!is_aead && cipher_alg->alg == RTE_CRYPTO_CIPHER_AES_CBC)
  	    {
  	      cipher_off = sizeof (esp_header_t);
  	      cipher_len = iv_size + pad_payload_len;
  	    }
  	  else			/* CTR/GCM */
  	    {
  	      u32 *esp_iv = (u32 *) (esp0 + 1);
  	      esp_iv[0] = sa0->seq;
  	      esp_iv[1] = sa0->seq_hi;
  
  	      cipher_off = sizeof (esp_header_t) + iv_size;
  	      cipher_len = pad_payload_len;
  	    }
  
  	  if (is_aead)
  	    {
  	      aad = (u32 *) priv->aad;
  	      aad[0] = clib_host_to_net_u32 (sa0->spi);
  	      aad[1] = clib_host_to_net_u32 (sa0->seq);
  
  	      /* aad[3] should always be 0 */
  	      if (PREDICT_FALSE (sa0->use_esn))
  		aad[2] = clib_host_to_net_u32 (sa0->seq_hi);
  	      else
  		aad[2] = 0;
  	    }
  	  else
  	    {
  	      auth_len =
  		vlib_buffer_get_tail (b0) - ((u8 *) esp0) - trunc_size;
  	      if (sa0->use_esn)
  		{
  		  u32 *_digest = (u32 *) digest;
  		  _digest[0] = clib_host_to_net_u32 (sa0->seq_hi);
  		  auth_len += 4;
  		}
  	    }
  
  	  crypto_op_setup (is_aead, mb0, op, session, cipher_off, cipher_len,
  			   0, auth_len, (u8 *) aad, digest, digest_paddr);
  
  	trace:
  	  if (PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED))
  	    {
  	      esp_encrypt_trace_t *tr =
  		vlib_add_trace (vm, node, b0, sizeof (*tr));
  	      tr->crypto_alg = sa0->crypto_alg;
  	      tr->integ_alg = sa0->integ_alg;
  	      u8 *p = vlib_buffer_get_current (b0);
  	      if (!sa0->is_tunnel)
  		p += vnet_buffer (b0)->ip.save_rewrite_length;
  	      clib_memcpy_fast (tr->packet_data, p, sizeof (tr->packet_data));
  	    }
  	}
        vlib_put_next_frame (vm, node, next_index, n_left_to_next);
      }
    if (is_ip6)
      {
        vlib_node_increment_counter (vm, dpdk_esp6_encrypt_node.index,
  				   ESP_ENCRYPT_ERROR_RX_PKTS,
  				   from_frame->n_vectors);
  
        crypto_enqueue_ops (vm, cwm, 1, dpdk_esp6_encrypt_node.index,
  			  ESP_ENCRYPT_ERROR_ENQ_FAIL, numa);
      }
    else
      {
        vlib_node_increment_counter (vm, dpdk_esp4_encrypt_node.index,
  				   ESP_ENCRYPT_ERROR_RX_PKTS,
  				   from_frame->n_vectors);
  
        crypto_enqueue_ops (vm, cwm, 1, dpdk_esp4_encrypt_node.index,
  			  ESP_ENCRYPT_ERROR_ENQ_FAIL, numa);
      }
  
    crypto_free_ops (numa, ops, cwm->ops + from_frame->n_vectors - ops);
  
    return from_frame->n_vectors;
  }
  
  VLIB_NODE_FN (dpdk_esp4_encrypt_node) (vlib_main_t * vm,
  				       vlib_node_runtime_t * node,
  				       vlib_frame_t * from_frame)
  {
    return dpdk_esp_encrypt_inline (vm, node, from_frame, 0 /*is_ip6 */ );
  }
  
  /* *INDENT-OFF* */
  VLIB_REGISTER_NODE (dpdk_esp4_encrypt_node) = {
    .name = "dpdk-esp4-encrypt",
    .flags = VLIB_NODE_FLAG_IS_OUTPUT,
    .vector_size = sizeof (u32),
    .format_trace = format_esp_encrypt_trace,
    .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
    .error_strings = esp_encrypt_error_strings,
    .n_next_nodes = 1,
    .next_nodes =
      {
        [ESP_ENCRYPT_NEXT_DROP] = "error-drop",
      }
  };
  /* *INDENT-ON* */
  
  VLIB_NODE_FN (dpdk_esp6_encrypt_node) (vlib_main_t * vm,
  				       vlib_node_runtime_t * node,
  				       vlib_frame_t * from_frame)
  {
    return dpdk_esp_encrypt_inline (vm, node, from_frame, 1 /*is_ip6 */ );
  }
  
  /* *INDENT-OFF* */
  VLIB_REGISTER_NODE (dpdk_esp6_encrypt_node) = {
    .name = "dpdk-esp6-encrypt",
    .flags = VLIB_NODE_FLAG_IS_OUTPUT,
    .vector_size = sizeof (u32),
    .format_trace = format_esp_encrypt_trace,
    .n_errors = ARRAY_LEN (esp_encrypt_error_strings),
    .error_strings = esp_encrypt_error_strings,
    .n_next_nodes = 1,
    .next_nodes =
      {
        [ESP_ENCRYPT_NEXT_DROP] = "error-drop",
      }
  };
  /* *INDENT-ON* */
  
  /*
   * fd.io coding-style-patch-verification: ON
   *
   * Local Variables:
   * eval: (c-set-style "gnu")
   * End:
   */
  